I am a little ashamed, it was not a driver problem.
In M5burner I didn't give the information about the wifi which prevented me to burn my M5Stick. It's confusing, the error message is about a port problem.
Thank you all for your answers

Hello to all,
I have just registered on the forum and I need your help.
I have just bought an M5StickC and a Core 2.
I can't get them to connect to M5 burner ("Check your COM and retry")
I am running Windows and the driver is installed (FTDI 2.12.36.4)


What did I miss?
Thanks in advance,
David